The game has a nice look to it and the little bit of lore you put in is nice despite the game being a tad short. I would suggest taking a look at your SFX for the rifle and make it sound a bit more meatier when it is being fired. That and I had slight trouble just trying to pick up the gun.
Beyond that, it's a decent sci-fi game.
Here's my channel for other games I have played. http://www.youtube.com/c/Levont